I have a Colorstar 1000 colour analyser/densitometer/timer here that I'm going to use as a timer on/off switch for my UV bank. I thought with a little effort maybe it could be used as a black and white densitometer for large format contact print negs also, the light sensor has an 8mm diameter spot capture area.
So I figure if I zero it out/calibrate it somehow and place it over my negs (8x10" +) on a light box (the same light box and same area of the light box every time) then I should be able to read the suggested exposure times for a dense area and then do the same for the light areas, base + fog etc...
I'll have times, but with a little log2 calculation and comparison with some step wedge results I can get some more traditional numbers right ?
The sensor is made to work the other way around, as in projecting (enlarging) a (colour) neg onto it from above - maybe I'll pull it apart and make the profile around the sensor much smaller so I can be more sure I'm metering the part of the image I want to.
Would gelling the negs so I only use one colour be of assistance ?
I'll choose 'slide' mode over neg to avoid the orange cast compensation
I guess testing if the reciprocity compensation 'slope' mode vs. 'linear' will have to be tested with different mediums - Pt/Pd DOP vs. Pt/Pd POP vs. silver gelatin etc...
Or should I instead come up with a similar system with my spot meter ? - some kind of rig above the light box to keep variables to a minimum ?
Guess I'm just wondering who else is or has thought along these lines previously, any tips/suggestions ?